/Engine/Source/Developer/CollectionManager/Public/ICollectionManager.h
Renames a collection. A .collection file will be added to disk and a .collection file will be removed.
true if the rename was successful. If false, GetLastError will return a human readable string description of the error.
bool RenameCollection ( [FName](API\Runtime\Core\UObject\FName) CurrentCollectionName, [ECollectionShareType::Type](API\Developer\CollectionManager\ECollectionShareType\Type) CurrentShareType, [FName](API\Runtime\Core\UObject\FName) NewCollectionName, [ECollectionShareType::Type](API\Developer\CollectionManager\ECollectionShareType\Type) NewShareType )